378572domain: NAppears in sequencesTriangular matrix, read by rows, that satisfies: T(n,k) = [T^2](n-1,k) when n>k>=0, with T(n,n) = (n+1).at n=29A102086Column 1 of triangular matrix A102086, which shifts upward to exclude the main diagonal under matrix square.at n=7A102087